<template>
  <div class="wrapper">
    <swiper :options="swiperOption" v-if="showSwiper">
        <swiper-slide  v-for="item of list" :key="item.id">
                <img class="swiper-img" :src="item.imgUrl">
        </swiper-slide>
        <div class="swiper-pagination"  slot="pagination"></div>
    </swiper>
  </div>
</template>

<script>
export default {
    name:'HomeSwiper',
    props:{
        list:Array
    },
    data(){
        return{
            swiperOption:{
                pagination:'.swiper-pagination',
                loop:true
            },
        }
    },
    computed:{
        //轮播图加载总是从最后一张开始，因为一开始list=[],后来才传入
        //值导致，因此，在list.length>0时渲染就可以了
        showSwiper(){
            return this.list.length;
        }
    }
}
</script>

<style scoped>
.wrapper>>>.swiper-pagination-bullet-active{
    background:#fff;
}
.wrapper{
    width:100%;
    height:0;
    overflow: hidden;
    padding-bottom: 31.25%;
    background: #eee;
    position: relative;
}
.swiper-img{
    width:100%;
    height:2.6rem;
}
</style>